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wdenk4a5b6a32001-04-28 17:59:11 +00001/*
2 * -*- mode:c -*-
3 *
4 * (C) Copyright 2000
5 * Marius Groeger <mgroeger@sysgo.de>
6 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 *
8 * void ull_write(unsigned long long volatile *address,
9 * unsigned long long volatile *data)
10 * r3 = address
11 * r4 = data
12 *
13 * void ull_read(unsigned long long volatile *address,
14 * unsigned long long volatile *data)
15 * r3 = address
16 * r4 = data
17 *
18 * Uses the floating point unit to read and write 64 bit wide
19 * data (unsigned long long) on the 60x bus. This is necessary
20 * because all 4 flash chips use the /WE line from byte lane 0
21 *
22 * IMPORTANT: data should always be 8-aligned, otherwise an exception will
23 * occur.
24 */
25
26#include <ppc_asm.tmpl>
27#include <ppc_defs.h>
28
29.globl ull_write
30ull_write:
31 lfd 0,0(r4)
32 stfd 0,0(r3)
33 blr
34
35 .globl ull_read
36ull_read:
37 lfd 0, 0(r3)
38 stfd 0, 0(r4)
39 blr